Propose a three-step synthetic sequence to accomplish the transformation below. 1) Br, hv; 2) t-BuOK; 3) MCPBA 1) Br, hv; 2) NaOEt; 3) HBr, ROOR 1) TSCI; 2) t-BuOK; 3) HBr, ROOR (Q), 1) Brz, hv; 2) NaNH,; 3) HyO 1) NaOEt; 2) HBr; 3) t-Buok O 1) TsCl, pyr: 2) NaOEt; 3) HO Br OH J" -8"